Improvement in door-bells



UNITED STATES PATENT oEErcE HENRY A'. DIEEKEs, 0E NEW YORK, NQY.

IMPROVEMENT IN DOOR-BELLS.

Specication forming part of Letters Patent N l 74,210, dated February 29, 1876; application tiled August 2, 1875.

To all whom it may concern: 1

Be it known that I, HENRY A. D1ERKEs,of the city, county, and State of N ew York, have invented certain Improvements in Door Calls or Bells, of which the following is a specication This invention relates to mechanism for op- .erating a spring-follower, in connection with a above mentioned.`

In the drawings, Figure 1 is an elevation of the base-plate, upon which the operative parts are mounted. Fig. 2 is a vertical section of the bell and the devices for operating it, taken in the plane of the line no a; in Fig. l. Fig. 3 is a modification of my device, showing a slightly-dilferent arrangement ofthe levers.

A is a base-plate, upon which' is mounted anordinary bell, B. The base-plate may be secured to the inner face of-a door, (l.v A spring-follower, D, is pivoted to the base-plate at a, and on its front or free end is provided with an escapement, consisting of a suitable trip, b. A detailed view of a good form of trip is shown in Fig. 3, in which'a spring, c, behind the said trip, tends to throw it habitually forward. A loosely-suspended hammer, E, is attached to the base-plate at some suitable point, d, and hangs in close proximity to the'follower D, but not attached inany way thereto. The follower D is provided with a o tirely di'erent from that shown in my patent spring, F, so arranged as to keep the said fol- 1o werlhabitually pressed down against a stop, e. A lever, G, of any desired form, passes through the door, and is pivoted, in any suitable or convenient manner, either to .the door, or to' a face-plate. I prefer to construct this lever-with the outer end turned upward, and provided with a suitable knob, H, but this is not essential. In this construction the inner end of the the trip b, which is carried up, bearing with it v the free end of the follower D. A certain amount of upward movement causes the lever to slip past, and escape from, the trip, and the spring F throws the follower down smartly against the stop e. In falling soine part of the follower will strike against the bell-hammer E, and throw it smartly against the bell` from whence it will fall back, by its own weight, to Then, when the knob H its normal position. is released, the spring g will draw down the inner end of the lever G, the trip b giving way to allow it to pass and assume its former position. It is then ready for another stroke.

In the modification shown in Flg. 3 the method of operation is substantially the same, theo'nly difference being that the lever G may be situated anywhere, and be connected, by a wire or link, h, with a'snpplementary lever, G', pivotedto the base-plate at any point, This latter lever is held down bya suitable spring, and its free end is arranged to engage the trip b, as plainly shown, the same general result being produced as in the arrangementy above described.

By my method of constructinga spring-follower for actuating a bell-hammer it can be operated either externally, as in a doorbell, or internally, asin bells operated lthrough the medium of wires and levers, the only requisite being some suitable mechanism acting on the trip to lift the spring-follower and suddenly release it. The device of the loosely-suspended ham-- mer E and a spring-follower operating thereon is not new. This is shown in my patent before mentioned. Nor is the use of a lever acting more or less indirectly on some form of escapement new, as these features may be found in numerous bells of this class 5 but the arrangement'of these parts is more or less complex, and differs greatly from the device shown in this application.

The essential feature of my present invention consists in aspring-followeriprovided-Withi arrangedas to be operated -upon directlyby a' an escztpement or trip, arranged to be actedi suitable `levermor levers, :substantiallyfas .deupon directly byalever orlevers of some kind,` scribed. in connection with a loosely-suspended `hann- A,11.1 Witness whereof I have hereunto signed mer. my name in the presence of two subscribing Having thus described my invention, @what witnesses.

I claim as neT is- HENRY A. DIER'KES.

In combination with a loosely-suspended Witnesses: f

hammer, E, a spring-follower, -D,pro\zi.f1ed fiat SA-M. ERonfSMITH,

its free end with a trip, b, said trip being so ARTHUR C. FRASER. 

